|
|
A263029
|
|
Numbers n such that A002322(n) + 1 is not a prime, where A002322 is Carmichael lambda.
|
|
5
|
|
|
25, 32, 50, 55, 75, 81, 96, 100, 110, 115, 119, 121, 128, 150, 153, 160, 162, 165, 176, 187, 200, 203, 209, 215, 220, 221, 224, 230, 235, 238, 242, 245, 253, 256, 261, 275, 287, 288, 289, 295, 297, 299, 300, 306, 319, 323, 324, 330, 335, 343, 345, 355
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,1
|
|
COMMENTS
|
Complement of A263028.
|
|
LINKS
|
Antti Karttunen, Table of n, a(n) for n = 1..25794
|
|
MATHEMATICA
|
Select[Range[1, 400], ! PrimeQ[CarmichaelLambda[#] + 1] &]
|
|
PROG
|
(MAGMA) [n: n in [2..400] | not IsPrime(CarmichaelLambda(n)+1)];
(PARI) for(n=1, 1e3, if(isprime((1 + lcm(znstar(n)[2]))) == 0, print1(n", "))) \\ Altug Alkan, Oct 12 2015
|
|
CROSSREFS
|
Cf. A002322, A263027, A263028.
Positions of zeros in A296077.
Cf. also A039689.
Sequence in context: A172007 A107258 A258876 * A225418 A035140 A050694
Adjacent sequences: A263026 A263027 A263028 * A263030 A263031 A263032
|
|
KEYWORD
|
nonn,easy
|
|
AUTHOR
|
Vincenzo Librandi, Oct 12 2015
|
|
STATUS
|
approved
|
|
|
|